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Traffic Report on 16 November '18

Fourteen objects reported inside ten LD

Fourteen asteroids are reported within ten lunar distances (LD) of our home world today. Nearest are 2018 VS8, which enters Earth's sphere of gravitational influence, moving in from 3.16 to 1.99 LD, and risk-listed NHATS target intruder 2018 VC7, heading out from 2.94 to 3.87 LD.

This report was generated at 2054 UTC with follow-up in today's DOU MPEC for five objects in the active traffic table above and for departed objects 2018 LQ2 and risk-listed 2018 VA8 and 2018 VC.

Approaching - sorted by 10-LD bubble entry date

Earth passage

I D

~Size

Distance today

Inside ten LD

Notes

7.4 LD Nov. 27*

2008 WD14

89 m

22.1 from 24.0 LD

Nov. 23 - 30

EPU +/- 2.04 days*

2.6 LD Dec. 15*

2018 VO9

15 m

17.2 from 17.7 LD

Nov. 29 - Dec. 31

EPU +/- 1.28 hours*, NHATS target, risk

4.1 LD Dec. 9*

2013 VX4

62 m

33.1 from 34.4 LD

Dec. 3 - 15

EPU +/- 2.35 days*

7.36 LD Dec. 22

163899 2003 SD220

1.17 km

46.33 from 47.47 LD

Dec. 17 - 26

NHATS target

7.3 LD Jan. 9*

2013 YM2

19 m

50.5 from 51.2 LD

Jan. 2 - 16

EPU +/- 1.25 days*, NHATS target

* EPU = Earth passage uncertainty

Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity on 16 November '18

The MPC's NEO Confirmation Page has 50 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 33 were "one nighters." So far The Tracking News has counted a total of 60 listings on the NEOCP today.

Impact Risk Monitoring on 16 November '18

Summary Risk Table for Risk Assessments Updated Today (last checks: NEODyS at 2359 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.

0000NNN000

Object

RiskMonitor

WhenNotedUTC

0000T0000YearRange

VI#

000NN00ProbCum

T0000PSCum

T0000PSMax

TS

Notes for Today's Latest Risk Assessments

2018 VO9

NEODyS

1700

2084-2117

48

6.66e-05

-5.53

-6.16

0

NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2018-11-09.270 to 2018-11-15.207."

2018 VX8

JPL Sentry

1700

2060-2101

2

1.0064e-08

-6.66

-6.71

0

JPL: Computed at 07:35 today Pacific time based on 37 observations spanning 5.8430 days (2018-Nov-10.43278 to 2018-Nov-16.27576). Diameter approximately 0.110 km. from weighted mean H=22.53.

NEODyS

1700

2060-2118

9

2.78e-06

-4.26

-4.56

-

NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2018-11-10.434 to 2018-11-14.234."

2018 VL8

JPL Sentry

1700

2033-2033

1

2.175e-06

-3.87

-3.87

0

JPL: Computed at 07:29 today Pacific time based on 30 observations spanning 5.9032 days (2018-Nov-10.20912 to 2018-Nov-16.11234). Diameter approximately 0.095 km. from weighted mean H=22.76.

NEODyS

1700

2033-2072

2

1.91e-06

-3.95

-3.95

0

NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2018-11-10.210 to 2018-11-15.272."

2018 VA8

JPL Sentry

1700

2099-2116

27

2.97079291e-05

-5.64

-6.04

0

JPL: Computed at 07:39 today Pacific time based on 34 observations spanning 4.0471 days (2018-Nov-12.28874 to 2018-Nov-16.33588). Diameter approximately 0.014 km. from weighted mean H=26.85.

NEODyS

1700

2098-2118

78

2.47e-05

-5.77

-6.29

-

NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2018-11-12.290 to 2018-11-15.275."

2018 VS6

NEODyS

1700

2083-2118

44

2.09e-04

-4.71

-4.83

-

NEODyS: "Based on 73 optical observations (of which 0 are rejected as outliers) from 2018-11-09.545 to 2018-11-15.476."

2018 VP6

NEODyS

1700

2088-2118

4

2.07e-06

-6.84

-7.07

-

NEODyS: "Based on 27 optical observations (of which 1 are rejected as outliers) from 2018-11-10.279 to 2018-11-15.385."

2018 VO6

NEODyS

1700

2048-2097

6

7.16e-05

-3.58

-3.61

0

NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2018-11-05.411 to 2018-11-15.280."

2018 VC

JPL Sentry

1700

2109-2118

10

6.87158e-06

-6.28

-6.60

0

JPL: Computed at 07:21 today Pacific time based on 126 observations spanning 15.054 days (2018-Nov-01.24873 to 2018-Nov-16.30252). Diameter approximately 0.018 km. from weighted mean H=26.32.

NEODyS

1700

2108-2118

18

4.84e-06

-6.44

-6.8

-

NEODyS: "Based on 123 optical observations (of which 0 are rejected as outliers) from 2018-11-01.250 to 2018-11-15.231."

2018 TJ6

NEODyS

1700

2111

1

1.95e-10

-9.31

-9.31

0

NEODyS: "Based on 55 optical observations (of which 0 are rejected as outliers) from 2018-10-15.516 to 2018-11-15.355."

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.